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一、前言 近年来,通过对各种类型矿床中硫化物矿物对的硫同位素比值的测定,弄清了S_4~3的富集次序,即为方铅矿→黄铜矿→闪锌矿→黄铁矿。而且查明了一般热液矿床中硫化物矿物对的硫同位素分馏系数要比接触交代或区域变质作用有关的矿床的大。勒斯克等研究了希思-斯蒂尔和布罗肯希尔变质矿床的硫同位素分馏作用,指出在这些矿床中
I. Introduction In recent years, by determining the sulfur isotope ratios of sulfide mineral pairs in various types of deposits, it has been clarified that the enrichment order of S_4 ~ 3 is galena → chalcopyrite → sphalerite → yellow iron ore. It is also found that the sulfur isotope fractionation coefficients of sulphide mineral pairs in general hydrothermal deposits are larger than those of deposits related to metasomatism or regional metamorphism. Lysk et al. Studied the sulfur isotopic fractionation of the Heath-Steele and Brooken Hill metamorphic deposits and pointed out that in these deposits